Direct observation of bulk second-harmonic generation inside a glass slide with tightly focused optical fields
| Autor: | Susobhan Das, Shima Fardad, Alessandro Salandrino, Xianghui Wang, Rongqing Hui |
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| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Physics Field (physics) business.industry Physics::Optics Second-harmonic generation Radiation Interference (wave propagation) Polarization (waves) 01 natural sciences Molecular physics 010309 optics Condensed Matter::Materials Science Optics 0103 physical sciences Phenomenological model 010306 general physics business Beam (structure) |
| Zdroj: | Physical Review B. 93 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.93.161109 |
| Popis: | Bulk second-harmonic generation (SHG) inside glass slides is directly detected unambiguously without interference from surface contributions. This is enabled by tightly focused and highly localized ultrashort laser pulses. The theoretical calculations based on vector diffraction theory and the phenomenological model of SHG inside centrosymmetric materials agree well with the measured far-field SHG radiation patterns for different polarization states of the fundamental beam. The results indicate that the observed bulk SHG is predominantly related to the bulk parameter ${\ensuremath{\delta}}^{\ensuremath{'}}$ and originates from the three-dimensional field gradient in the focal region. |
| Databáze: | OpenAIRE |
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